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Finding the Fourth Proportional to 245,311.20, 367,513.20 and 139,816.80

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Solution

The fourth proportional to 245,311.20, 367,513.20 and 139,816.80 is: 209,466.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,311.20 : 367,513.20 = 139,816.80 : x
  2. Step 2: Convert to fraction form
    245,311.20/367,513.20 = 139,816.80/x
  3. Step 3: Cross multiply
    245,311.20x = 367,513.20 × 139,816.80
  4. Step 4: Simplify right side
    245,311.20x = 51,384,519,581.76
  5. Step 5: Solve for x
    x = 51,384,519,581.76/245,311.20
  6. Step 6: Final answer
    x = 209,466.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.